<template>
	<view class="cart-container" v-if="cart.length !== 0">
    <!-- 收货地址组件 -->
    <my-address></my-address>
		<!-- 购物车商品列表的标题区域 -->
    <view class="cart-title">
      <!-- 左侧的图标 -->
      <uni-icons type="shop" size="18"></uni-icons>
      <!-- 描述文本 -->
      <text class="cart-title-text">购物车</text>
    </view>
    <!-- 商品列表区域 -->
   <!-- uni-swipe-action是最外层包裹性质的容器 -->
    <uni-swipe-action>
       <block v-for="(goods,i) in cart" :key="i">     
         <!-- uni-swipe-action-item可以为其子节点提供滑动操作，需要通过option属性来指定操作按钮的配置信息 -->
      <uni-swipe-action-item :options="options" @click="swipeActionClickHandler(goods)">
        <my-goods :show-radio="true" :good="goods" :show-num="true" @radio-change="radioChangeHandler" @num-change="numberChangeHandler"></my-goods>     
      </uni-swipe-action-item>
      </block>
    </uni-swipe-action>
    
    <!-- 结算区域 -->
    <my-settle></my-settle>
	</view>
  <!-- 空白购物车区域 -->
  <view class="empty-cart" v-else>
    <image src="/static/cart_empty@2x.png" class="empty-img"></image>
    <text class="tip-text">空空如也~~~</text>
  </view>
</template>

<script>
  import badgeMix from '@/mixins/tabbar-badge.js'
  import {mapState,mapMutations} from 'vuex'
	export default {
    //将badgeMix混入到当前的页面中进行使用
    mixins:[badgeMix],
    computed:{
      //将m_cart模块的cart数组映射到当前的页面中使用
      ...mapState('m_cart',['cart'])
    },
    methods:{
      ...mapMutations('m_cart',['updateGoodsState','updateGoodsCount','removeGoodsById']),
      //商品的勾选状态发生了变化
      radioChangeHandler(e){
        // console.log(e);
        this.updateGoodsState(e)
      },
      //商品的数量发生了变化
      numberChangeHandler(e){
        // console.log(e);
        this.updateGoodsCount(e)
      },
      //点击了滑动操作按钮
      swipeActionClickHandler(goods){
        // console.log(goods);
        this.removeGoodsById(goods.goods_id)
      },
    },
		data() {
			return {
				options:[{
          text:'删除',
          style:{
            backgroundColor:'#C00000'
          }
        }]
			};
		},
    
	}
</script>

<style lang="scss">
.cart-title{
  height: 40px;
  display: flex;
  align-items: center;
  font-size: 14px;
  padding-left: 5px;
  border-bottom: 1px solid #efefef;
  .cart-title-text{
    margin-left: 10px;
  }
  
}
.cart-container{
  padding-bottom: 50px;
}
.empty-cart{
  display: flex;
  align-items: center;
  flex-direction: column;
  
      .empty-img{
        margin-top: 30px;
        width: 90px;
        height: 90px;
      }
      
      .tip-text{
        font-size: 12px;
        color: gray;
        margin-top: 15px;
      }
}
</style>
